Efficient transport controlled by biharmonic frictional driving

Martin Maza-Cuello, Diego Maza
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Abstract

Dry friction has been proposed as a rectifying mechanism allowing mass transport over a vibrating surface, even when vibrations are horizontal and unbiased. It has been suggested that the drift velocity will always saturate when the energy of the input oscillation increases, leading to a vanishing efficiency that would hinder the applicability of this phenomenon. Contrary to this conjecture, in this work we experimentally demonstrate that, by carefully controlling the forcing oscillations, this system can maintain a finite transport efficiency for any input energy. A minimal friction model explains the observed dependencies of the drift velocity on the signal parameters in the case of biharmonic base oscillations, which can be extended to obtain efficiency estimates for any periodic excitation.
由双谐波摩擦驱动控制的高效传输
有人提出,干摩擦是一种整流机制,即使振动是水平和无偏差的,也能使物质在振动表面上传输。有人认为,当输入振荡的能量增加时,漂移速度总是会达到饱和,导致效率消失,从而阻碍了这一现象的应用。与这一猜想相反,在这项工作中,我们通过实验证明,通过仔细控制强迫振荡,该系统可以在任何输入能量下保持有限的传输效率。一个最小摩擦模型解释了在双谐波基振荡情况下观察到的漂移速度对信号参数的依赖性,该模型可以扩展到任何周期性激励的效率估计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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